package cn.pengpeng.day05.firstMR;

import java.io.IOException;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

/**
 * 本地的聚合
 * @author root
 *
 */
public class MyCombiner extends Reducer<Text, IntWritable, Text, IntWritable>{
	
	@Override
	protected void reduce(Text key, Iterable<IntWritable> values,Context context) throws IOException, InterruptedException {
		int count = 0;
		for (IntWritable value : values) {
			count = count+value.get();
			//count++
		}
		context.write(key, new IntWritable(count));
	}
}
